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from the GNU version of the Collaborative International Dictionary of English

  • An order of Bryozoa of which Rhabdopleura is the type. See rhabdopleura.

from The Century Dictionary and Cyclopedia

  • A class of Arthropoda, composed of the orders Trilobita and Merostomata (the latter containing the Xyphosura, Synziphosura, and Eurypterida): so called from the foot-like or ambulatory character of the mouth-parts. They are an ancient generalized type, represented at the present day by the king-crabs only.


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